METHOD TO PROTECT GAS-TURBINE ENGINE FROM UNSTABLE OPERATION OF COMPRESSOR Russian patent published in 2007 - IPC F04D27/02 

FIELD: aircraft engineering.

SUBSTANCE: invention relates to method of provision of safe flying of aircraft powered by gas-turbine engine. According to proposed method, air pressure after compressor is measured, of speed of changes said pressure is determined and compared with threshold value and if threshold value is exceeded, signal is formed to cut off fuel delivery into combustion chamber and cut in air bypass in compressor. According to invention, air pressure at engine input P_in ^* is measured and speed of rotation of high pressure rotor n hp is determined, and by measured value of speed of high pressure rotor n hp its first derivative n hp is found and at subsequent reduction of speed of air pressure after compressor by low its threshold value signal is formed to cut in delivery of fuel into combustion chamber. Metering out of fuel is done to control law

EFFECT: increased safety of flight owing to restoration of initial operating conditions of engine at all stages of flight, including takeoff.

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